git.gag.com Git - fw/altos/blob - src/ao_packet_slave.c

   1 /*
   2  * Copyright © 2009 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 void
  21 ao_packet_slave(void)
  22 {
  23         uint8_t status;
  24
  25         ao_radio_set_packet();
  26         ao_tx_packet.addr = ao_serial_number;
  27         ao_tx_packet.len = AO_PACKET_SYN;
  28         while (ao_packet_enable) {
  29                 status = ao_packet_recv();
  30                 if (status & AO_DMA_DONE) {
  31                         memcpy(&ao_tx_packet.callsign, &ao_rx_packet.packet.callsign, AO_MAX_CALLSIGN);
  32                         ao_packet_send();
  33                 }
  34         }
  35         ao_exit();
  36 }
  37
  38 void
  39 ao_packet_slave_start(void)
  40 {
  41         ao_packet_enable = 1;
  42         ao_add_task(&ao_packet_task, ao_packet_slave, "slave");
  43 }
  44
  45 void
  46 ao_packet_slave_stop(void)
  47 {
  48         if (ao_packet_enable) {
  49                 ao_packet_enable = 0;
  50                 ao_radio_abort();
  51                 while (ao_packet_task.wchan) {
  52                         ao_wake_task(&ao_packet_task);
  53                         ao_yield();
  54                 }
  55                 ao_radio_set_telemetry();
  56         }
  57 }
  58
  59 void
  60 ao_packet_slave_init(void)
  61 {
  62         ao_add_stdio(ao_packet_pollchar,
  63                      ao_packet_putchar,
  64                      NULL);
  65 }